public class Test2 {
    /**
     *  下面这种是两个线程并发执行，而产生了线程不安全的问题
     */
    public static int count = 0;
    public static void main(String[] args) throws InterruptedException {
        Thread t1 = new Thread(()->{
            for (int i = 0; i < 50000; i++) {
                count++;
                System.out.println("t1:"+count);
            }
        });
        Thread t2 = new Thread(()->{
            for (int i = 0; i < 50000; i++) {
                count++;
                System.out.println("t2:"+count);
            }
        });
        t1.start();
        t2.start();

        t1.join();
        t2.join();
        System.out.println("count:"+count);
    }
}
